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1标准编制背景及重点难点问题1.1标准编制背景目前我国大多既有建筑又非节能建筑,特别是公共建筑,每年消耗了大量能源。目前既有公共建筑面积约45亿平方米,为城镇建筑面积的27%,占城乡房屋建筑总面积的10.7%,但据测算分析,公共建筑能耗约占建筑总能耗的20%。相对于居住建筑,公共建筑,特别是大型公共建筑具有能耗高的特点,其单位电耗可达居住建筑的7.5～1.5倍,
1 standard background and key issues of compilation 1.1 standard compilation background At present, most of our existing buildings are not energy-efficient buildings, especially public buildings, consume a lot of energy each year. At present, the existing public building area is about 4.5 billion square meters, accounting for 27% of the total urban construction area and 10.7% of the total urban and rural housing construction area. However, public buildings consume about 20% of the total building energy consumption according to the calculation and analysis. Relative to residential buildings, public buildings, especially large public buildings with high energy consumption characteristics, the unit power consumption of residential buildings up to 7.5 to 1.5 times,